Here is the full list of all 59 Brutal Legend achievements. It takes around 35-40 hours to unlock all of the achievements on Windows.
Double Team with every Tainted Coil unit
Win an AI stage battle - Brütal difficulty
Win a single-player Stage Battle against the AI using only orders
Win 50 match-made multiplayer battles.
Win 10 games on Hammer of Infinite Fate maps - ranked or vs. the Brütal AI.
Win 10 match-made multiplayer battles.
Play a multiplayer game on all Hammer of Infinite Fate multiplayer maps.
Double Team with every Drowning Doom unit
Hit 6 enemies with the explosion from a Brood's Double Team
Hit 15 enemies with one Agony Ball using the Pain Lifter's Double Team
Kill 20 enemies with one Bleeding Death
Kill 25 enemies with the grinder of one Rock Crusher
Trap 15 enemies in one ring of fire with the Fire Baron's Double Team
Play with or against another player who has this Achievement
Win a ranked multiplayer match
Achieve 100% completion on the stats screen
Win an AI stage battle - any difficulty
View all Legends
Visit the grave of a fallen hero while wearing the Black Metal Threads.
Make out with Ophelia while wearing the Mountain Man Threads.
Unlock all songs in the Mouth of Metal
Complete Campaign mode on Gentle
Complete Campaign mode on Normal
Complete Campaign mode on Brütal
Complete "Sea of Black Tears"
Double Team with every Ironheade unit
Ride one of every ridable animal.
Ride a Razorfire Boar into the Sea of Black Tears and live to tell the tale.
Free all 120 Bound Serpents
Complete all racing secondary missions
Purchase all upgrades in the Motor Forge
Complete all hunting secondary missions
Acquire 3,000 Fire Tributes
Kill 15 enemies with a Metal Beast while wearing the Zaulia Threads.
Kill a Tollusk using only Ground Urchins
Kill 20 Tainted Coil units with the Disgorger.
Jump over a Hextadon in the Deuce
Run down 20 animals in the Deuce with the Coiling Maw equipped.
Kill 20 Drowning Doom units with the Eye of Sorrow.
Complete "Dry Ice, Wet Graves"
Free 80 Bound Serpents
Gain 5 or more seconds of hang time in a single jump - any mode
Learn all guitar solos
View all vistas
Summon all Motor Forges
Slay 150 enemies with the Deuce - any mode
Complete 20 ambush, outpost defense, or mortar secondary missions
Complete "It's Raining Death"
Complete "Sanctuary of Sin"
Complete "Pilgrimage of Screams"
Complete "Battle for Bladehenge"
Personally smote 300 enemies - any mode
Free 40 Bound Serpents
Complete "Lair of the Metal Queen"
Complete "Exploited in the Bowels of Hell"
Purchase 1 upgrade in the Motor Forge
Chisel four Razputin heads onto Mt. Rockmore.
Complete "Welcome to the Age of Metal"
Spend 250,000 fans - any mode